Lead pencil



Feb. 19

E. F. PIERCE LEAD PENCIL Filed Sept. 17, 1920 Panarea Feb. 19, 1924.

' UNITI-:D STATES PATENT oFrlcE.

EARL r. PIERCE, or CHICAGO, ILLINOIS, AssIeNon. 'ro THE WAIILfCoiIrANY,or

wIuIINGroN, DELAWARE, A coEronn'rIoN or DELAWARE LEAD rENcIL.

Application led September 17, 1920. Serial 30.410,818.

ToaZZ wlwm t my concem: y Be it known that I, EARL F. PIERCE, a citizenof the United States, and resident of Chicago, in the' county of Cookand State of Illinois, have invented a certain new and usefulImprovement in Lead Pencils, of which the following is a full, clear,concise, and exact description, reference being had to the accompanyingdrawings, forming a part of this specification.

My invention relates to improvements in lead pencils and is particularlyconcerned with improvements in that type of pencil in which a barrel of:more or less permanentmaterial is provided with means at one end forreceiving and guiding a pencil lead, other means being mounted in thebarrel for feeding the lead through the receiving and guiding meanswhereby the end ofthe lead is exposed for use.

The objects of my invention are- F irst: vto provide'/ a lead pencil ofthe character described which is simple in con-A struction andeconomical to manufacture.

Second: to provide a pencil of the character described by means of whichthe lead can be easily and quickly extruded the desired degree from theend of the pencil and held in itsadjusted position, and

intermediate its ends whereby the lead can be properlyl adjusted andheldin its adjusted position. I

Other objects will appear as this` description progresses, referencebeing had to the accompanying drawings, in which- Figure 1 is a centrallongitudinal. section through a pencil embod ing my invention.

Figure 2 is a side e evation partially in section in a plane at ,rightangles tothe section plane of Figure 1. Figure 3 is an enlargedtransversesection taken on a line corresponding to the vlinee-eofFigureL w Figure 4: is a side elevation of a portion of my improvedpencil with certain :parts removed, and l Figure 5 is an elevation of aportion of the screw-threaded sleeve forming a part of my so invention.

Throughout the vreference characters will be used for referring tosimilar parte.

vMy pencil comprises a barrel 10 which is barrel 10 so as tovprovideamagazine for Third: to provide a pencil having .means nula-1' groove 21corresponding in length to several views, similar.'

preferably formed of metal although it may l5 v be formed of other moreor less permanent material. At one end the barrel may be provided with asuitable lead receiving and guiding tube 11', the outer end of which istapered as shown at12 to conform to the 60 inner periphery of thetapered portion 13 of the barrel. A tip 14 has screwthreaded engagementwith the outer end of the lead receiving land iding tube 11 as shown at`'15 and is provi edI with a shoulder 16 which 65 bears against the endof the barrel and causes the lead receiving tube 11 and the tip, itself,to be tightly clamped to the end of the pencil when the tip iscompletely threaded 1nto the outer end 12'of-t-he tube 1l. The tip 14,in effect, constitutes a continuation of the lead-receiving and'guidingtube 11.

If desired, a cup 17 may be soldered or otherwise secured in theopposite end of the receiving pencil leads 18.` A cap 19 may' be usedfor closing the end of the. magazine. The parts thus far described formno part of my invention except as theyco-act with the parts about to bedescribed, and it will,

therefore, be understood that so far as these parts are concerned theymay be modifiedA as desired or as is found to --be convenient.

In making my improved pencil, two oppo-v sitely disposed longitudinallyextending slots 20 are first formedin the walls of the barrel thereof ata point intermedia-tev its ends and thewalls of the barrel are thenrolled or swaged inwardly to form an an- 00 the length of the slots sothat when this operation is completed, the slots will lie at-'the bottomof; the groove and likewise extend through the shoulders or end walls 22of the grooves. I then provide a feed bar 2 3,which 95 ,is 'slidablymounted in' the barrel' and the edges of which project through the slotso that the .sides of the slot form guides for the edges of the feed bar23 thus holdin the feed bar against rotation. The edges o the 10o feedbai-,are screw-threaded as indicated at 24. One end of the rod 25 issecured to the feed bar 23 and the other-'end is slidably mounted intheslot receiving and guiding tube 11 and provides the means for extrudVing the "lead from this member-when the feed liar is urged outwardly bythe means about to be described. f v

Vlil

This means comprises a sleeve 26 which is preferably formed of twosections 27 and 28 having the interlocking tongues 29 and 3() which canbe snapped together to form a continuous sleeve, the engaging edges 3land 32 of thev tongues preferably being rounded to facilitate thisoperation. When the two halves are snapped together around the bottomWall of the groove 21, they will be held against' longitudinaldisplacement relative to each other by the end walls 22 of the groove.rlhe inner sides of the two portions of the sleeves are screw-threadedas indicated at 32 to provide screw-threaded engagement withthecorrespondingly screwthreaded edges of the feed bar.

From the above description, it will be clear that all that is necessaryto do to adjust the feed bar 23 to any desired position, Vis merely toyrotate the sleeve 26. By thus rotating the sleeve 26 in one direction,the feed bar will be moved outwardly and when operated in the oppositedirection, the feed bar will be moved inwardly.

While I have shown the outer surface of they sleeve 26 as projectingbeyond the outer these details, but is capable of other adapl tationsand modifications within the'scope of the appended claims. t A Havingthus described my invention, what l claim is l. A pencil comprising abarrel having its walls swaged inwardly intermediate the ends thereof toform an annular groove, the bot- `tom of said groove being provided witha slot lextending longitudinally of said barrel, means at one end ofsaid barrel for receiving and guiding a lead, a feed bar slidablymounted in said barrel, one edge of said feed bar being screw-threadedand extending between the edges of said slot, an internall threadedsleeve rotatably mounted, in lsai groove and having screw-threaded(engagement with the threaded edge of said feed bar, said sleeve beingformed with a plurality of sections having interlocking engagement witheach other and held against longitudinal displacement relative to eachother by the end walls ofsaid means at one end of said feed bar forexroove, and.

maaar? mounted in said barrel, one edge of said feed bar beingscrew-threaded and extending be- .tween the edges of said slot, aninternally threaded sleeve rotatably mounted in said groove and havingscrew-threaded engagement with the threaded edge of said feed bar, saidsleeve being formed with a plurality of sections having interlockingengagement with each other, and means at one end of said'feed bar forexpelling a lead from said lead receiving and guiding means.

3; A pencil comprising a tubular barrel, the wall of which is reduced indiameter for a distance intermediate its end to form an annular groove,a slot extending longitudinally of said barrel in the bottom and ends ofsaid groove, a feed bar slidably mounted in said barrel and lyingentirely therewithin except at said slot, one'edge of said feed barbeing screw threaded and extending between the edges of said slot, aninternally threaded sleeve journaled in said groove and having its screwthreads co-operating with said threaded ed e to reciprocate said feedbar, a lead ui ing and receiving means rigidly secure in one end of saidbarrel, and means on said bar for expelling a lead from said guidingmeans. v

4. A pencil comprising a barrel having., its walls depressed to areducedl diameter intermediate its endsto form anvannular groove, a slotin the bottom and ends of said groove and extending longitudinally ofsaid barrel, a feed bar reciprocable within said barrel, one edge ofsaidbar bein threaded,

los i said bar lying entirely withinsai barrel ex- '1 cept at saidreduced portion, where' said edge projects through said wall, saidthreaded edge being longer than said slot, a ring rotatably held in saidgroove and having internal screw threads which engage said feed bar toreciprocate the latter within said barrel, a lead guiding means in oneend of said barrel, and means at one end of. said

